Methyl 3-nitro-4-(trifluoromethoxy)pyridine-5-acetate
Methyl 5-methoxy-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-methoxy-3-(trifluoromethoxy)pyridine-5-acetate
Methyl 3-nitro-2-(trifluoromethoxy)pyridine-6-acetate
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